US7384408B2 - Flow set including an identifying key member having two projections cooperating to define a unique code - Google Patents
Flow set including an identifying key member having two projections cooperating to define a unique code Download PDFInfo
- Publication number
- US7384408B2 US7384408B2 US10/113,866 US11386602A US7384408B2 US 7384408 B2 US7384408 B2 US 7384408B2 US 11386602 A US11386602 A US 11386602A US 7384408 B2 US7384408 B2 US 7384408B2
- Authority
- US
- United States
- Prior art keywords
- flow set
- tube
- tube segment
- identifying key
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime, expires
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/14—Detection of the presence or absence of a tube, a connector or a container in an apparatus
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/60—General characteristics of the apparatus with identification means
- A61M2205/6045—General characteristics of the apparatus with identification means having complementary physical shapes for indexing or registration purposes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/28—Clamping means for squeezing flexible tubes, e.g. roller clamps
- A61M39/281—Automatic tube cut-off devices, e.g. squeezing tube on detection of air
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/1411—Drip chambers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/14212—Pumping with an aspiration and an expulsion action
- A61M5/14232—Roller pumps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16886—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body for measuring fluid flow rate, i.e. flowmeters
- A61M5/1689—Drip counters
Definitions
- This invention relates to liquid administration and more specifically, it is concerned with a liquid flow set useful for administering liquids to a patient through a flexible tube.
- Flow sets for use with a liquid pump must be attentively designed for safe use.
- a dedicated tube-segment of the tube must be installed in the pump and the tube should be installed in the right place, and tightened, straightened and stretched.
- the flow set should be full with liquid before using it and should remain full as long as it is in use, to prevent air injections into the patient.
- the pumping tube-segment should be replaced with other tube-segments when it loses flexibility.
- the pump should be able to identify and verify that an appropriate flow set has been installed therein for use.
- the present invention is concerned with a liquid flow set that includes a number of safety features, and a method for identifying the flow set by the liquid pump in which it is used.
- the present invention provides a flow set for administering liquid to a patient using pumps (such as liquid pumps), a method for identifying a flow set by the pump in which it is used, and pumps for use with a flow set.
- pumps such as liquid pumps
- a disposable flow set for administering liquid to a patient including at least one pumping tube-segment, connected to the first administration tube, enabling installation of the flow set in a pump, a second administration tube installed in the end of the last pumping tube-segment, and an anti-free-flow valve installed in the end of the second administration tube.
- the flow set further includes a drip chamber or a spike, and a first administration tube to administer liquid from the drip chamber or the spike.
- the flow set further includes at least one identifying key member, wherein each of the identifying key members is connected to each of the tube-segments.
- each of the identifying key members is clamped on the tube-segment and includes a number of teeth members adapted to form a unique code or combination of location and width.
- the teeth are preferably adapted to be inserted into a compatible niche(s) in a specific liquid pump, thereby preventing insertion of the flow set into a non-compatible liquid pump.
- each key member further includes a pressing-plate for pressing the tube-segment against a pressure sensor of the liquid pump.
- a pressing-plate for pressing the tube-segment against a pressure sensor of the liquid pump.
- the door of the liquid pump is closed, it presses the pressing-plate, which, in turn, presses the tube segment against the pressure sensor, thereby enabling the liquid pump to use the sensed pressure to verify the existence of the flow set.
- each pumping tube-segment of the disposal flow set is bordered by a stopper at both ends thereof.
- the stoppers preferably are installed in fitted niches in a liquid pump.
- the length of each pumping tube-segment of the disposal flow set is preferably in a range of 81-83 millimeters.
- each pumping tube-segments of the disposal flow set is preferably in a range between 2.5 millimeters and 2.7 millimeters
- the diameter of the first and/or second administration tube is preferably in a range between 1.1 millimeters and 1.3 millimeters.
- the disposal flow set further includes a controller in the inlet of the drip chamber or spike, enabling control of the volume of the liquid drops entering therein.
- a method for identifying the flow set of the present invention.
- the method preferably includes (1) pre-measuring the interior volume of the flow set, (2) measuring the quantity or volume of liquid flowing into the flow set, (3) comparing the measured volume of liquid to the interior volume of the flow set, and (4) if the measured volume of the liquid used to fill the flow set is different than the interior volume of the flow set, stopping the operation of the liquid pump or activating an alarm, or both.
- a method for conducting a priming procedure includes (1) continuously measuring the quantity of liquid flowing into the flow set and the pressure of liquid in the administration tubes, (2) pumping liquid into the flow set to empty or purge air therefrom and to fill liquid therein, (3) recognizing the first arrival of liquid to an anti-free-flow valve in the flow set, by sensing a rise of pressure in the administration tube, (4) obtaining the volume of liquid used to fill the flow set, from the measurement of liquid flow quantity until the rise of pressure is a predetermined ratio high, and (5) comparing the volume of liquid used to fill the flow set with the interior volume of the flow set.
- the resistance of the anti-free-flow valve for air passing is significantly lower than the resistance of the anti-free-flow valve for liquid passing
- the first arrival of liquid to the anti-free-flow valve can be determined.
- the volume of liquid used to fill the flow set is different than the interior volume of the flow set, the operation of the liquid pump is stopped or an alarm is activated, or both occur.
- a method for identifying a flow set includes (1) pre-counting the number of entering drops, per a volume unit of liquid, which should enter the drip chamber or the spike of the flow set, (2) when operating a liquid pump, counting the drops number per supplied liquid unit, and (3) if the drops per volume unit of supplied liquid is different than the pre-counted number of drops, then stopping operation of the pump or activating an alarm, or both.
- FIG. 1 illustrates a flow set with a drip chamber, a number of pumping tube-segments and an anti-free-flow valve
- FIG. 2 illustrates a pumping tube-segment for installation in a pump
- FIG. 3 illustrates a cross-section of an identifying key member
- FIG. 4 illustrates a chart of the pressure inside the tube of a flow set during the priming procedure.
- the present invention provides a flow set for administering a liquid when using a pump, and a method for identifying such a flow set by the pump in which it is used.
- Flow sets for use with a liquid pump must be attentively designed for safe use.
- a dedicated tube-segment of the tube must be installed in the pump and the tube must be installed in the right place, and tightened, straightened and stretched.
- the flow set must be full with liquid before using it and should remain full as long as it in use, to prevent an air injection into a patient.
- the pumping tube-segment must be replaced with other tube-segments when it loses its flexibility.
- the flow set of the present invention along with the compatible pump, has a number of features that ensures the use of only a flow set that is compatible with a liquid pump. There are stoppers in both ends that are shaped to install in fitted niches in a liquid pump. Further, the flow set includes an identifying key member that prevents the insertion of a wrong flow set into the pump, and enables liquid pressure measuring. If the pump is unable to measure the liquid pressure, the liquid pump will not start. Each tube-segment has a specific length and the system (a liquid pump with compatible flow set) uses methods of identifying the flow set that has been installed in the liquid pump.
- FIG. 1 illustrates a flow set with a drip chamber, a number of pumping tube-segments and an anti-free-flow valve.
- a flow set 10 includes a drip chamber 11 that enables installation in a housing with drop sensors that are located in a liquid pump 17 (shown in FIG. 2 ). The drop sensor counts the drops passing through the drip chamber 11 .
- a first administration tube 12 administers the liquid through the pumping tube-segments 13 .
- Stoppers 14 border each pumping tube-segment 13 in the ends thereof. These stoppers 14 are used to install a pumping tube-segment 13 in a liquid pump in a correct position—tight, straight and stretched.
- a second administration tube 15 administers the pumped liquid to an anti-free-flow valve 16 .
- An identifying key member 24 is installed on each pumping tube segment 13 .
- FIG. 2 illustrates a pumping tube-segment 13 of the present invention, and a way to install the segment in a liquid pump.
- One of the pumping tube-segments 13 is in use and installed in a liquid pump 17 .
- An identifying key 24 is installed on the tube-segment 13 .
- the identifying key 24 preferably surrounds or clamps the tube-segment 13 and includes a number of teeth 24 a .
- Each tooth has a specific width and a specific location, thereby creating a code that enables insertion of the tube-segment 13 only in a liquid pump 17 that has a set of complementary niches 17 a that are arranged in the same code or combination.
- the identifying key 24 also includes a pressure-plate 24 b .
- the pressure-plate 24 b is pressed by the door 25 (shown in FIG. 3 ) of the liquid pump 17 , which presses the tube-segment 13 against a pressure sensor 26 (shown in FIG. 3 ) that is installed in the liquid pump 17 behind the identifying key member 24 .
- the stoppers 14 are installed in complementary niches of a liquid pump 17 , and force the pumping tube-segment 13 to stay tight, straight and stretched.
- the identifying key 24 prevents insertion of the tube-segment 13 in a non-compatible liquid pump, and the liquid pump 17 will not start unless the pressure sensor measures pressure.
- FIG. 3 illustrates a cross-section of an identifying key 24 .
- the identifying key 24 clamps the tube-segment 13 and includes a set of teeth 24 a to enable insertion of the flow set only into a compatible liquid pump.
- the key 24 also includes a pressure-plate 24 b , which is pressed by the door 25 of the liquid pump and, in turn, presses the tube-segment 13 against a pressure sensor 26 of the liquid pump, thereby enabling pressure measurement.
- FIG. 4 illustrates a chart of the pressure inside the tube of a flow set during the priming procedure.
- the flow set 10 When installing a flow set 10 in a liquid pump, the flow set 10 is empty and the liquid does not start to flow yet. Therefore, the pressure in the tubes is low 18 .
- the liquid pushes the air from the tubes out through the anti-free-flow valve 16 , which has a resistance to the airflow and therefore causes the pressure to rise to a medium level 19 .
- the liquid fills the whole flow set 10 and liquid starts to flow through the anti-free-flow valve 16 .
- the resistance of the valve to a liquid flow is significantly higher than the resistance to airflow. Therefore, a significant rise of pressure 20 is sensed and the pressure remains high 21 as long as liquid flows through the set.
- the pressure rise 20 is used by the liquid pump to determine that the flow set 10 is full.
- the pumps' controller compares the volume of liquid used to fill the flow set 10 with the interior volume of the flow set, and uses this information to identify the flow set. If the liquid pump does not identify the installed flow set as the required flow set, the liquid pump stops operating or an alarm is activated, or both.
- the one or more tube-segments 13 may be formed of polyvinylchloride (PVC), polyurethane or silicone.
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/112,368 US8025654B2 (en) | 2001-04-04 | 2008-04-30 | Method of identifying a flow set for use with a pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL142446 | 2001-04-04 | ||
IL142446A IL142446A (en) | 2001-04-04 | 2001-04-04 | Flow set and a method to identify said flow set by a liquid pump |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/112,368 Division US8025654B2 (en) | 2001-04-04 | 2008-04-30 | Method of identifying a flow set for use with a pump |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020177821A1 US20020177821A1 (en) | 2002-11-28 |
US7384408B2 true US7384408B2 (en) | 2008-06-10 |
Family
ID=11075301
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/113,866 Expired - Lifetime US7384408B2 (en) | 2001-04-04 | 2002-04-01 | Flow set including an identifying key member having two projections cooperating to define a unique code |
US12/112,368 Expired - Fee Related US8025654B2 (en) | 2001-04-04 | 2008-04-30 | Method of identifying a flow set for use with a pump |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/112,368 Expired - Fee Related US8025654B2 (en) | 2001-04-04 | 2008-04-30 | Method of identifying a flow set for use with a pump |
Country Status (4)
Country | Link |
---|---|
US (2) | US7384408B2 (es) |
EP (1) | EP1247538B8 (es) |
ES (1) | ES2247213T3 (es) |
IL (1) | IL142446A (es) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101869731A (zh) * | 2010-06-01 | 2010-10-27 | 深圳市深科医疗器械技术开发有限公司 | 一种输液泵及其控制方法 |
CN101869730A (zh) * | 2010-06-01 | 2010-10-27 | 深圳市深科医疗器械技术开发有限公司 | 一种输液管 |
WO2011150558A1 (zh) * | 2010-06-02 | 2011-12-08 | 深圳市深科医疗器械技术开发有限公司 | 一种输液管 |
WO2011150560A1 (zh) * | 2010-06-02 | 2011-12-08 | 深圳市深科医疗器械技术开发有限公司 | 一种输液泵及其控制方法 |
US11191897B2 (en) | 2019-03-04 | 2021-12-07 | Eitan Medical Ltd. | In cycle pressure measurement |
US11890451B2 (en) | 2019-03-05 | 2024-02-06 | Eitan Medical Ltd. | Anti-free-flow valve |
US12011567B2 (en) | 2018-02-11 | 2024-06-18 | Eitan Medical Ltd. | Flex-stroke infusion pump |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL141137A0 (en) | 2001-01-28 | 2002-02-10 | Caesaria Med Electronics Ltd | Liquid pump |
WO2003006101A2 (en) * | 2001-07-10 | 2003-01-23 | Medrad, Inc. | Devices, systems and method for infusion of fluids |
US20050015074A1 (en) * | 2003-07-17 | 2005-01-20 | Trombley Frederick W. | Medical connector, fluid delivery system, and method of use therefor |
US7850659B1 (en) | 2003-08-18 | 2010-12-14 | Medrad, Inc. | Fluid container holding device, fluid delivery system and method of use therefor |
US20050277873A1 (en) | 2004-05-27 | 2005-12-15 | Janice Stewart | Identification information recognition system for a medical device |
US7927313B2 (en) | 2004-05-27 | 2011-04-19 | Baxter International Inc. | Medical device configuration based on recognition of identification information |
IL180305A0 (en) * | 2006-12-25 | 2007-06-03 | Swi Barak | Administration set with two keys |
EP2158930B1 (en) | 2008-08-27 | 2017-06-28 | F. Hoffmann-La Roche AG | Flow control valves for leakage detection, free-flow prevention and occlusion detection |
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-
2001
- 2001-04-04 IL IL142446A patent/IL142446A/en not_active IP Right Cessation
-
2002
- 2002-03-28 ES ES02007100T patent/ES2247213T3/es not_active Expired - Lifetime
- 2002-03-28 EP EP02007100A patent/EP1247538B8/en not_active Expired - Lifetime
- 2002-04-01 US US10/113,866 patent/US7384408B2/en not_active Expired - Lifetime
-
2008
- 2008-04-30 US US12/112,368 patent/US8025654B2/en not_active Expired - Fee Related
Patent Citations (44)
Publication number | Priority date | Publication date | Assignee | Title |
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US3966358A (en) | 1973-11-09 | 1976-06-29 | Medac Gesellschaft Fur Klinische Spezialpraparate Mbh | Pump assembly |
US4150673A (en) * | 1977-02-03 | 1979-04-24 | Pharmachem Corporation | Coded entry system for blood bag |
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Also Published As
Publication number | Publication date |
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US8025654B2 (en) | 2011-09-27 |
ES2247213T3 (es) | 2006-03-01 |
IL142446A0 (en) | 2002-03-10 |
EP1247538A2 (en) | 2002-10-09 |
IL142446A (en) | 2009-07-20 |
US20020177821A1 (en) | 2002-11-28 |
EP1247538B8 (en) | 2006-01-04 |
EP1247538B1 (en) | 2005-08-24 |
EP1247538A3 (en) | 2002-12-18 |
US20080208124A1 (en) | 2008-08-28 |
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